technology
Haver & Boecker
If a vibrating screen continues to operate while having issues with pegging , blinding , broken screens or screen media with incorrectly sized openings , the screened pile will likely be contaminated and might require rescreening .
polyurethane on the top layer and more rigid polyurethane on the bottom layer . This combination works well for hard-hitting applications requiring openings greater than 5cm and , especially when used with tapered openings , helps eliminate pegging and blinding by allowing larger particles to better screen or reject near-sized particles .
Some screen media manufacturers address high-impact applications and improve wear life by supplying screens with solid areas to withstand the heaviest of materials . Engineered media ’ s versatility addresses not only the material ’ s composition , but also its temperature . Manufacturers can create polyurethane products to withstand high-heat applications , such as when screening silica after running it through a drying drum . Operators can also ask for additionally customised screen media for unique and challenging applications .
A lot to choose from
Manufacturers create engineered screen media out of several different types of material , such as polyurethane , rubber , and perforated plates . Polyurethane offers a long lifespan and durability . Look for a polyurethane screen media manufacturer who blends their own material and who pours their polyurethane opencast rather than injection moulded . The opencast process takes about 9 hours to complete and typically lasts about 1.5 to two times longer than injection-moulded products . In addition , opencast polyurethane permanently hardens when cured to maintain its chemical properties , so it resists wear and tear . Injection-moulded screens , though faster to manufacture , can soften when the temperature rises during screening , resulting in less wear life .
Haver & Boecker
Steve Fair , Tyler engineered media manager at Haver & Boecker .
Kivagrupp
Manufacturers can create rubber screens thicker than polyurethane for improved durability and reduced noise , and to handle highimpact applications and resist abrasion . Weir Minerals Linatex rubber and polyurethane screens , for example , can be used on a wide range of processing plants .
Advanced Engineering Group
Many mining and aggregates operations have long used traditional products like woven wire cloth for screens , such as that manufactured by Advanced Engineering Group , with great results .
QUARRY SA | march 2017 _ 31